Question

Ребят помогите решить задачу..СРОЧНО! Найдите число молекул в алюминий предмете массой 135 гр?буду очень благодарна...

Answer 1

Дано m=135 г   M=27 г/моль   N- ?

N= m*Na/M=135*6,02*10^23/27=3*10^24

Answer 2

Дано:
m=135г=0,135кг
M(Al )=27г/моль=0,027кг/моль
Na=6,02×10²³моль-1
N-?
N=Na×m/M
N=6,02×10²³×0,135/0,027=30×10²³=3×10²⁴

Answer 3

Calculation of the Number of Molecules in an Aluminum Object

To find the number of molecules in an aluminum object with a mass of 135 grams, we need to use the concept of Avogadro's number and the molar mass of aluminum.

1. Determine the molar mass of aluminum: - The molar mass of aluminum (Al) is approximately 26.98 grams per mole.

2. Calculate the number of moles of aluminum: - To find the number of moles, divide the mass of the aluminum object by its molar mass: ``` Number of moles = Mass of aluminum object / Molar mass of aluminum = 135 g / 26.98 g/mol ≈ 5.001 moles ```

3. Use Avogadro's number to calculate the number of molecules: - Avogadro's number is approximately 6.022 x 10^23 molecules per mole. - Multiply the number of moles by Avogadro's number to find the number of molecules: ``` Number of molecules = Number of moles x Avogadro's number = 5.001 moles x (6.022 x 10^23 molecules per mole) ≈ 3.012 x 10^24 molecules ```

Therefore, the number of molecules in an aluminum object with a mass of 135 grams is approximately 3.012 x 10^24 molecules.